The funnel is used for both collection and storage. This funnel is about ten inches across and holds quite a bit of water. I attached the plastic tubing to the bottom of the funnel with silicone glue then ran the tube out the side of the tub through a hole (also sealed with silicone glue). The tube is left raised higher than the funnel to prevent siphoning until I'm ready to drain it. When I want water I yank out the golf tee from the end of the tube and drain the water into a bottle.

The funnel hangs inside the tub by three strings. I can adjust the strings from outside the tub to align the funnel after placement of the vinyl sheet.

I tried smaller funnels in earlier versions but as the water droplets joined up and ran down the plastic often they'd get heavy enough to drop before reaching the center point. Using the larger funnel allowed me to collect water from a larger zone.

This wouldn't work well in a bugout situation, but if you are hunkered down they are great. You can make them out of any container or even a hole in the ground lined with plastic. It's cheap, easy, and incredibly low-tech.

-Mark